Door-lock.



I. W. WILSON.

DOOR LOOK.

ApPLIoATIoN FILED 11011.15, 1912.

1,124,373. Patented Jan. 12, 1915.

2 SHEETS-SHEET 1.

THE MORRIS PETERS CQ, PHUTOLITHO.` WASHINGYON, Dv C.

I. W. WILSON.

DOOR LOCK;

APPLICATION FILED NOV. 1`5, 1912. 1, 1 24,373.. Patented Jan. 12, 1915.

l 2 SHEETS-SHEET 2. 6?! 6J 6 J0 l 7 [M W'saii,

THE NoRRlS PETERS 60,. FHOTOJJTHQ.. WASHINGIUN. D. C.

@FAES FATE@ @FFllQEg 1131A XV. VJJLSON, OF E'OST, TEXiS.

DOOR-LOCK.

Application led November 15, 1912.

To all whom t may concern:

Be it known that I, IRA W'. YVILSON, a citizen oil the United States, residing at Post city, in the county of Garza, State of Terras, have invented certain new and useful improvements in Door-Locks; and l do hereby declare the -following to be a full, clear, and exact description oi the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

rllhis invention relates to improvements in door locks.

rlihe principal. object of the invention is to provide a lock which may be operated from either side and which when locked Jfrom the inside will automatically project a shutter over the key-hole on the outside and thereby prevent any one on the outside from gaining access to the room until the lock has been released from the inside.

Another object of the invention is to provide a door lock of the character described which includes a pair of latch bolts adapted to be respectively actuated from either side of the lock thereby permitting said lock to be attached to either a right or left handed door so that the key-hole on the outside will be covered by its respective shutter regardless of the position of the lock.

A iurtherobject of the invention is to provide a lock of the character described which is extremely simple in construction, it being composed of a minimum number of parts, and is cheap to manufacture.

W ith these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.`

ln the drawings: Figure 1 is a perspective view of the lock showing the relative positions of the key-hole slots, Fig. 2 is a plan view of one of the lock sections showing the latch bolt in its inoperative or retracted position, Fig. 3 is a similar view oi the other lock section, Fig. -lis a View similar to Fig. 2- but showing the parts in position when the shutter is arranged over the key-hole Specification of Letters Patent.

Fatented Jan. 12, 1915.

Serial No. 731,573.

slot, Fig. 5 is a view similar to Fig. 2 but showing the positions of the parts when the shutter is arranged over the key-hole slot, Fig. 6 is a detail sectional view taken on the line 6-6 of Fig. 1, Fig. 7 is a central longitudinal sectional view through the lock, Fig. 8 is a detail transverse sectional view taken on the line 8-8 of Fig. 7, Fig. 9 is a perspective view of one of the tumblers, Fig. 10 is a perspective view of one of the tumblerl supporting guide brackets.

Like reference numerals designate corresponding parts in all the ligures of the drawings.

Referring to the drawings, my invention comprises a lock which comprises opposed sections A. and B respectively. T he sections include opposed plates 5 and 6 respectively, and these plates are formed with inwardly extending inner and outer rectangular iianges 7 and 8 respectively, the latter litting within the former so that the two sections will conjointly form a lock casing. The plate 5 of the section A is formed near its lower end with a key-hole opening 10. Disposed within each section is a guide bracket, which is designated as a whole by the reference numeral 11. This bracket is secured to the plate 5 oi the section A above and at one side of the key-hole slot 9, and the other bracket 11 is attached to the plate 6 of the section B at a point above and at one side of the key-hole slot 10. These brackets are arranged one above the other within the casing thus formed. Each bracket is formed from a single piece of sheet metal or from a. casting as the case may be and includes a base 12 having a longitudinal wall 13 extending upwardly from one edge. The wall 13 terminates in an inwardlv extending horizontal guide 14, and this guide is formed with upwardly extending diverging flanges 15-15. rl'he wall 7 of the section A opposite the bracket 11 is formed withv an opening 16 which is arranged in alinement with the guide lei. The wall 8 of the section B opposite the bracket 11 thereof is 'formed with an opening 17. lt will thus be observed that when the sections A and B are attached one to the other, the opening 17 will be disposed above the opening 16, the opening 16 registering with an opening 16a formed in the adjacent side wall 8 of the section B and the opening 17 registering with an opening 171 formed in the side wall 7 of the section A.

A latch bolt 18 includes a shank 19 having a head 20 formed at one end. The end of the shank 19 opposite the head 20 is seatod within the guide 14 of the bracket 11 of the section A and the head 20 is arranged to operate in the alined openings 16 and 16a of said sections.

A latch bolt 21 includes a shank 22 and having a head 23 formed at one end. This bolt 21 has its end opposite the head seated within the guide 14 of the bracket 11 carried by the section B, and the head 23 operates in the registering openings 17 and 17a of said section. 1t will be noted that the bolt 23 is disposed above the bolt 18 and that both bolts are adapted to be projected in the Same general direction. The shank 19 of the bolt 18 is centrally formed with a sweep 24 which is disposed in operative position with respect to the key-hole slot 9, and the shank 22 of the latch bolt 21 is centrally formed with a sweep 25 which is disposed in operative relation to the key-hole slot 10.

Secured to the plate 5 of the section A below the guide 14 is a pin 26, and pivotally mounted upon this pin is a tumbler 27 which is formed with a laterally extending lug 28 adapted to iit into any one of a plurality of recesses 29 formed in the shank 19 of the latch bolt 18, said tumbler or" course extending across the sweep 24.

Secured to the plate 6 of the section B below the guide 14 is a pin 30, and pivotally mounted upon this pin is a tumbler 31 which is formed with a laterally extending lug 32 adapted to tit into any one of a plurality of recessesl 33 formed in the shank 22 or the latch. bolt 21, said tumbler of course extending across the sweep 25. The tumblers 27 and 31 are respectively held in operative engagement with the bolts by means of fiat springs 34, one end of each spring bearing against the free end of a respective tumbler and having its other end detachably engaged between a. pair of upstanding spaced and ottset lingers 35-35 formed on the bracket 11 at one side of the guide 14. IThese fingers include inwardly extending upper ends 36-36 which serve as stops and prevent the spring from becoming accidentally unseated.

l/Vhen it is desired to unlatch the bolt 18 or the bolt 21, a key is inserted in either of the key-hole slots 9 or 10 as the case may be, and upon rotation of the key a respective tumbler 27 or 31 will be elevated against the tension ot' its spring 34, said tumbler of course being thereby disengaged. from the bolt and permitting said boltto be projected upon engagement of the ward of the key in the sweep as will be readily understood.

Secured to the plate 5 of the section A on opposite sides of the key-hole slot 9 are spaced guides 37-37, and operating in these guides is a shutter 38 which is adapted when in its gravitated position to cover said keyhole slot 9. The upper end of the shutter is formed with an elongated opening 39, andv secured to the plate 5 within the opening 39 is a pivot plate 40 having a recess 41 formed therein. rl`his plate is disposed in registration with the key-hole slot 10 of the section B, and the recess 41 is adapted to receive the point of the key when said key is inserted through the key-hole slot 10. rlhe opening 39 is of such length as to permit of said shutter gravitating so as to close the keyhole slot 9 without interference with the pivot plate 40. A T-shaped lever 42 comprises a long arm 43 and oppositely directed short arms 44-44, one arm 44 being pivotally connected, as at 45, to the plate 5 and the long arm 43 being formed with an elongated slot 46. An operating lever 47 for the shutter 38 is fulcrumed intermediate its ends, as at 48, to the plate 5 thereby forming a long arm 49 and a short arm 50, the former being formed with a longitudinal slot 51 which is connected to the upper end of the shutter 38 by means of a pin 52. A link 53 is pivotally connected at one end, as at 54, to the lateral arm 44 of the .lever 42 opposite the pivot 45, and at its other end, as at 55, to the short arm 50 oit' the lever 47. A pin 56 projects from the shank 22 of the bolt 21 and into the slot 43 of' the lever1 42.

From the foregoing, it will be observed that when the latch bolt 21 is projected, the pin 56 will by its engagement with the lever 42 rock said lever upon its ulcrum 45, and this lever will, through the link 53, rock the lever 47 upon its ulcrum 48. lThe lever 47 through its pin and slot connection with the shutter 38 will gravitate said shutter to close the key-hole slot 9, as is shown in Fig. 4 of the drawings. `When the latch bolt 21 is retracted the shutter 38 will be elevated to the position shown in F ig. 2 of the drawings.

Secured to the plate 6 of the section B on opposite sides of the key-hole slot 10 are spaced guides S7-57, and operating in these guides is a shutter 58 which is adapted when in its gravitated position to cover said keyhole slot 10. A T-shaped lever 59 comprises a long arm 60 and oppositely directed short arms 61-61, one arm 61 being pivotally connected, as at 62, to the plate 6 and the long arm 60 being formed with an elongated slot 63. An operating lever 64 for the shutter 58 is fulcrumed intermediate its ends, as at 65, to the plate 6 thereby forming a long arm 66 and a short arm 67, the former being formed with a longitudinal slot 68 which is connected to the upper end of the shutter 58 by means of a pin 69. A link 70 is pivotally connected at one end, as at 71, to the lateral arm 61 of the lever 59 opposite the pivot 62, and at its other end, as at 72, to the short arm 67 of the lever 64. A pivot 73 projects from the shank 19 of the bolt 18 and into the slot 63 of the lever 59.

From the foregoing, it will be observed that when the latch bolt 18 is projected, the

pin 7 3 will by its engagement with the lever 59 rock said lever upon its fulcrum 62, and this lever will, through the link 7 0 rock the lever 64k upon its fulcrum 65. The lever 64 through its pin and slot connection with the shutter 58 will gravitate said shutter to close the key-hole slot 10, as is shown in Fig. 5 of the drawings. When the latch bolt 18 is retracted the shutter 58 will be elevated to the position shown in Fig. 3.

From the foregoing, it will be observed that the lock may be operated from either side, and that when the lock is operated from the inside of a room, the shutter controlling the outside key-,hole will be actuated to close said opening, thereby preventing any one from entering the room unless the lock bolt be retracted by a key from the inside.

What is claimed is:

1. In a door lock, a casing including opposed sections each being formed with a keyhole, upper and lower latch bolts respectively supported in the sections of the casing for sliding movements, guides iXed to said casing in respective sections, shutters for the key-holes respectively mounted in the guides for sliding movements, and means respectively connecting the bolt of one section and the shutter of the other section for actuating the latter upon movement of the former.

- 2. In a door lock, a casing including opposed sections each being formed with a keyhole, upper and lower latch bolts respectively supported in the sections of the casing for sliding movements, guides fixed to said casing in respective sections, shutters for the key-holes respectively mounted in the guides for sliding movements, a lever fulcrumed intei-mediate its ends upon each section, one end of the lever having pivotal connection with a respective shutter, and means respectively connecting the bolt of one section and the other end of the lever of the other section for actuating the latter upon movement of the former.

3. In a door lock, a casing including opposed sections each being Aformed with a keyhole, upper and lower latch bolts respectively supported in the sections of the casing for sliding movements, shutters for the keyholes respectively mounted in the sections of the casing for sliding movements, a lever fulcrumed intermediate its ends upon each section and forming consequent long and short arms, the long arm having a pin and slot connection with a respective shutter, a T-shaped lever having one of its lateral arms fulcrumed upon a respective casing, a link pivotally connected at one end to the other arm of a T-shaped lever and at its other end to the short arm of the first mentioned lever, and a pin and slot connection between the bolt of one section and the long arm of the T-shaped lever of the other section for actuating the shutter upon movement of the bolt.

In testimony whereof I aHiX my signature in presence of two witnesses.

IRA W. WILSON.

Witnesses:

J. S. GRISHAM, l/VILEY J. YOUNG.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, 20.0. n 

